4
				1	5
		2
			6
6	1
			4

Difficulty: Very hard (0)

			5		4
			3
	1		2
		6		3
		2
4		1

Difficulty: Super easy (0)

		3			5
3			1	6
2
					2
	4	1			3
1			3

Difficulty: Super easy (0)

6					1
			2	1
	1	5
3					5

Difficulty: Very easy (0)